Calm down, we are coming to a time when our "heroes" ask questions and understand their feelings towards each other.
Whereas at the beginning all this was only a sexual game and fantasies, aki realizes that he is in love because of his sudden jealousy of imagining sensei with another...
For sensei it's the same, she definitely realizes that she doesn't care about the other guys and that she gets all excited in the presence of aki...
It's slow, but we're getting to a point where the two cheaters are going to find it harder and harder to accept that the other one is in a relationship, jealousy, and thinking about each other during private moments...
I feel that the next bow with masahi asking aki for help will confirm all this, and that sensei will not like it at all...